Improvement in devices for transmitting motion



'UNITEDV STATES PATENT Onnrcn THOMAS O. ENTWIS'ILE, OF N EW YORK, N. Y.

IMPROVEMENT IN DEVICES FOR TRANSMITTING MOTION.

Specification forming part of Letters Patent No. 57,693, dated September4, 1866.

To all whom t may concern:

Be it known that I, THOMAS C. EN'rwIsTLn, of 330 East Fourth street, inthe city, county, and State of New York, have invented a new and usefulDevice for Transmitting Motion; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebein g had to the accompanying drawings,'forming a part of thisspecification, in whichl Figure 1 is a plan view of my invention asapplied to a steering apparatus. Fig. 2 is a longitudinal section of thesame.

Similar letters ot' reference indicate corresponding parts in bothfigures.

'Ihe object of my invention is to obtain a very compact arrangement ofgearing for increasing or diminishing the speed of rotary motion; and tothis end it consists in a novel combination and arrangement of threebevelgears, two of which have a common axis, and the axis of the thirdis radial to and revolves around the first-named axis.

To enable others to construct and apply my invention, I will proceed todescribe it with referece to the drawings.

A A are two upright standards, such as are commonly used for supportingthe wheel shaft of a` steering apparatus. B is a horizontal shaft,supported in the standards in the position commonly occupied by thewheelshaft, and prevented from turning by being keyed or otherwisefirmly secured in the standard A. y

rIhe drum H is fitted to turn freely on the shaft B, and thesteering-wheel G is secured iirmly to the hollow journal j' of arevolving yoke, F, which is iitted to turn freely on the shaft B, thesaid journal j' working in a bear ing in the standard A.

G D E are the three bevel-gears. C is fast upon the shaft B, andconsequently stationary. D is tted to turn freely on an axle, d, securedto the revolving yoke, and occupying a position perpendicular and radialto the shaft. E is firmly secured to the drum H. D

gears with both E and G.

The three gears are represented of uniform revolutions of the. said gearand drum to one of the wheel G and yoke. This double revolution isproduced owing to the gear D being made to operate as a lever of thethird order, the fulcrum of which is at the pitch-line of the gear O,the power being applied at d, and the weight at E. rIhe power beingequidistant be tween the fulcrum and the weight, the weight moves twiceas fast as the power moves.

rIhe same combination and arrangement of gearing may be used for a greatVariety of purposes.

It is applicable with especialadvantage, on account of its compactness,to driving screwpropellers at a higher speed than the engine, the yoke Fand axle d of the gear D being in such oase attached to the engineshaft,and the gear E being secured on the propellershaft.

In applying the invention to the reduction of speed the power would beapplied to the gear E, which, by its rotary motion, would cause .thegear D bothto rotate on its axle d and to creep around the stationarygear O, and thereby give rotary motion to the yoke F and any attachedshaft at the rate of half a revolution for every revolution of E.

In this operation the gear D operates as a lever of the second order,the fulcrum of which is at the pitch-line of the gear C, the power beingapplied at the point of contact of the gear E, and the weight being atd.

The weight, being equidistant between the fulcrum and the power, onlymoves half as fast as the power.

It must not be understood that the sizes of the three gears are requiredto be uniform;

rEhe sizes may be varied, and the movement transmitted will be increasedor diminished in velocity according to the relative size of the gears Oand E.

If the gears O and E are not of uniform size, the axle d will require tobe set oblique to the shaft B instead of perpendicular, as represented.

WV hat I claim as my invention, and desire to secure by Letters Patent,is

The combination and arrangement of three bevel-gears, O D E, and arevolving yoke, F, or its equivalent, to operate substantially ashereinspecified. v

T. C. ENTWISTLE. Vitnesses:

J. W. Goor/ins, A. LE CLERC.

